VPP-1440: clean up coverity warnings

Change-Id: Ic6823fb617ecae547a5f0e28b1e037848e40f682
Signed-off-by: Dave Barach <dave@barachs.net>

src/plugins/lb/node.c

@@ -646,13 +646,14 @@ lb_nodeport_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
           entry0 = hash_get_mem(lbm->vip_index_by_nodeport, &(udp_0->dst_port));
 
           //Enqueue to next
-          vnet_buffer(p0)->ip.adj_index[VLIB_TX] = entry0[0];
+          vnet_buffer(p0)->ip.adj_index[VLIB_TX] = entry0 ? entry0[0]
+              : ADJ_INDEX_INVALID;
 
           if (PREDICT_FALSE(p0->flags & VLIB_BUFFER_IS_TRACED))
             {
               lb_nodeport_trace_t *tr = vlib_add_trace (vm, node, p0,
                                                         sizeof(*tr));
-              tr->vip_index = entry0[0];
+              tr->vip_index = entry0 ? entry0[0] : ADJ_INDEX_INVALID;
               tr->node_port = (u32) clib_net_to_host_u16 (udp_0->dst_port);
             }
 

src/plugins/nsim/node.c

@@ -125,7 +125,10 @@ nsim_inline (vlib_main_t * vm,
 		       ep->current_length);
 	}
       else			/* out of wheel space, drop pkt */
-	b[0]->error = no_buffer_error;
+	{
+	  b[0]->error = no_buffer_error;
+	  is_drop0 = 1;
+	}
 
       if (is_trace)
 	{
@@ -134,8 +137,7 @@ nsim_inline (vlib_main_t * vm,
 	      nsim_trace_t *t = vlib_add_trace (vm, node, b[0], sizeof (*t));
 	      t->expires = expires;
 	      t->is_drop = is_drop0;
-	      if (is_drop0 == 0)
-		t->tx_sw_if_index = ep->tx_sw_if_index;
+	      t->tx_sw_if_index = (is_drop0 == 0) ? ep->tx_sw_if_index : 0;
 	    }
 	}
 

src/vpp-api/client/stat_client.c

@@ -102,12 +102,14 @@ stat_segment_connect (char *socket_name)
   if (connect (sock, (struct sockaddr *) &un, sizeof (struct sockaddr_un)) <
       0)
     {
+      close (sock);
       perror ("connect");
       return -1;
     }
 
   if ((mfd = recv_fd (sock)) < 0)
     {
+      close (sock);
       fprintf (stderr, "Receiving file descriptor failed\n");
       return -1;
     }
@@ -119,12 +121,14 @@ stat_segment_connect (char *socket_name)
 
   if (fstat (mfd, &st) == -1)
     {
+      close (sock);
       perror ("mmap");
       return -1;
     }
   if ((memaddr =
        mmap (NULL, st.st_size, PROT_READ, MAP_SHARED, mfd, 0)) == MAP_FAILED)
     {
+      close (sock);
       perror ("mmap");
       return -1;
     }

src/vpp/stats/stat_segment.c

@@ -157,6 +157,7 @@ vlib_stats_register_error_index (u8 * name, u64 * em_vec, u64 index)
   e.name[vec_len (name)] = '\0';
   e.type = STAT_DIR_TYPE_ERROR_INDEX;
   e.offset = index;
+  e.offset_vector = 0;
   vec_add1 (sm->directory_vector, e);
 
   /* Warn clients to refresh any pointers they might be holding */

src/vppinfra/cuckoo_template.c

@@ -908,6 +908,7 @@ u8 *CV (format_cuckoo) (u8 * s, va_list * args)
   uword free = 0;
   uword used = 0;
   uword use_count_total = 0;
+  float load_factor;
   CVT (clib_cuckoo_bucket) * b;
   /* *INDENT-OFF* */
   clib_cuckoo_foreach_bucket (b, h, {
@@ -935,8 +936,11 @@ u8 *CV (format_cuckoo) (u8 * s, va_list * args)
   s = format (s, "Used slots: %wu\n", used);
   s = format (s, "Use count total: %wu\n", use_count_total);
   s = format (s, "Free slots: %wu\n", free);
-  s =
-    format (s, "Load factor: %.2f\n", (float) (used) / (float) (free + used));
+  if (free + used != 0)
+    load_factor = ((float) used) / ((float) (free + used));
+  else
+    load_factor = 0.0;
+  s = format (s, "Load factor: %.2f\n", load_factor);
 #if CLIB_CUCKOO_DEBUG_COUNTERS
   s = format (s, "BFS attempts limited by max steps: %lld\n",
 	      h->steps_exceeded);
@@ -968,7 +972,10 @@ float CV (clib_cuckoo_calculate_load_factor) (CVT (clib_cuckoo) * h)
     }
   });
   /* *INDENT-ON* */
-  return (float) nonfree / (float) all;
+  if (all)
+    return (float) nonfree / (float) all;
+  else
+    return 0.0;
 }
 
 /** @endcond */